Fixed: Show the downloaded size and total file size in the download notification.

* Displaying the downloaded size and total size in the download notification.
* Displaying the same information in the Download screen UI. We have moved the Download Progress text ("In Progress", "Downloading", "Paused") above the progress bar, and now show the size information in its place.

app/src/main/java/org/kiwix/kiwixmobile/nav/destination/library/online/DownloadBookItem.kt

@@ -54,6 +54,7 @@ import org.kiwix.kiwixmobile.core.utils.ComposeDimens.ONE_DP
 import org.kiwix.kiwixmobile.core.utils.ComposeDimens.SIXTEEN_DP
 import org.kiwix.kiwixmobile.core.utils.ComposeDimens.TEN_DP
 import org.kiwix.kiwixmobile.core.utils.ComposeDimens.TWO_DP
+import org.kiwix.kiwixmobile.core.zim_manager.Byte
 import org.kiwix.kiwixmobile.ui.BookDescription
 import org.kiwix.kiwixmobile.ui.BookIcon
 import org.kiwix.kiwixmobile.ui.BookTitle
@@ -113,6 +114,7 @@ private fun DownloadBookContent(
       BookTitle(item.title)
       Spacer(modifier = Modifier.height(TWO_DP))
       BookDescription(item.description.orEmpty())
+      DownloadStateText(item)
       ContentLoadingProgressBar(
         progressBarStyle = ProgressBarStyle.HORIZONTAL,
         modifier = Modifier.padding(horizontal = ONE_DP, vertical = FIVE_DP),
@@ -183,17 +185,33 @@ private fun DownloadStateRow(item: LibraryDownloadItem) {
     verticalAlignment = Alignment.CenterVertically
   ) {
     Text(
-      text = item.downloadState.toReadableState(LocalContext.current).toString(),
+      text = item.readableEta.toString(),
       style = MaterialTheme.typography.bodyMedium,
       color = MaterialTheme.colorScheme.onTertiary,
-      modifier = Modifier
-        .weight(1f)
-        .testTag(DOWNLOADING_STATE_TEXT_TESTING_TAG)
+      modifier = Modifier.weight(1f)
     )
     Text(
-      text = item.readableEta.toString(),
+      text = getDownloadedSizeText(item.bytesDownloaded, item.totalSizeBytes),
       style = MaterialTheme.typography.bodyMedium,
       color = MaterialTheme.colorScheme.onTertiary
     )
   }
 }
+
+private fun getDownloadedSizeText(downloadedBytes: Long, totalBytes: Long): String {
+  if (totalBytes <= 0 || downloadedBytes <= 0) return ""
+  val downloadedText = Byte(downloadedBytes.toString()).humanReadable
+  val totalText = Byte(totalBytes.toString()).humanReadable
+  return "$downloadedText/$totalText"
+}
+
+@Composable
+private fun DownloadStateText(item: LibraryDownloadItem) {
+  Text(
+    text = item.downloadState.toReadableState(LocalContext.current).toString(),
+    style = MaterialTheme.typography.bodyMedium,
+    color = MaterialTheme.colorScheme.onTertiary,
+    modifier = Modifier
+      .testTag(DOWNLOADING_STATE_TEXT_TESTING_TAG)
+  )
+}

core/src/main/java/org/kiwix/kiwixmobile/core/downloader/downloadManager/FetchDownloadNotificationManager.kt

@@ -65,6 +65,7 @@ import org.kiwix.kiwixmobile.core.Intents
 import org.kiwix.kiwixmobile.core.R
 import org.kiwix.kiwixmobile.core.dao.DownloadRoomDao
 import org.kiwix.kiwixmobile.core.main.CoreMainActivity
+import org.kiwix.kiwixmobile.core.zim_manager.Byte
 import javax.inject.Inject
 
 const val DOWNLOAD_NOTIFICATION_TITLE = "OPEN_ZIM_FILE"
@@ -117,13 +118,38 @@ class FetchDownloadNotificationManager @Inject constructor(
     return when {
       downloadNotification.isCompleted -> context.getString(R.string.complete)
       downloadNotification.isFailed -> context.getString(R.string.download_failed_state)
-      downloadNotification.isPaused -> context.getString(R.string.paused_state)
+      downloadNotification.isPaused -> buildSubtitle(
+        context.getString(R.string.paused_state),
+        downloadNotification.downloaded,
+        downloadNotification.total
+      )
+
       downloadNotification.isQueued -> context.getString(R.string.resuming_state)
       downloadNotification.etaInMilliSeconds < 0 -> context.getString(R.string.downloading_state)
-      else -> super.getSubtitleText(context, downloadNotification)
+      else -> buildSubtitle(
+        super.getSubtitleText(context, downloadNotification),
+        downloadNotification.downloaded,
+        downloadNotification.total
+      )
     }
   }
 
+  private fun buildSubtitle(
+    mainText: String,
+    downloaded: Long,
+    total: Long
+  ): String {
+    val sizeText = getDownloadedSizeText(downloaded, total)
+    return "$mainText • $sizeText"
+  }
+
+  private fun getDownloadedSizeText(downloadedBytes: Long, totalBytes: Long): String {
+    if (downloadedBytes <= 0 || totalBytes <= 0) return ""
+    val downloadedText = Byte(downloadedBytes.toString()).humanReadable
+    val totalText = Byte(totalBytes.toString()).humanReadable
+    return "$downloadedText/$totalText"
+  }
+
   @RequiresApi(Build.VERSION_CODES.O)
   private fun createChannel(channelId: String, context: Context) =
     NotificationChannel(
@@ -250,12 +276,12 @@ class FetchDownloadNotificationManager @Inject constructor(
     download: Download
   ) {
     val notificationBuilder = getNotificationBuilder(download.id, download.id)
-    val cancelNotification = getCancelNotification(fetch, download, notificationBuilder)
-    downloadNotificationManager.notify(download.id, cancelNotification)
+    val pauseNotification = getPauseNotification(fetch, download, notificationBuilder)
+    downloadNotificationManager.notify(download.id, pauseNotification)
   }
 
   @Suppress("InjectDispatcher")
-  private fun getCancelNotification(
+  private fun getPauseNotification(
     fetch: Fetch,
     download: Download,
     notificationBuilder: Builder
@@ -270,7 +296,13 @@ class FetchDownloadNotificationManager @Inject constructor(
       return notificationBuilder.setPriority(NotificationCompat.PRIORITY_DEFAULT)
         .setSmallIcon(android.R.drawable.stat_sys_download_done)
         .setContentTitle(notificationTitle)
-        .setContentText(context.getString(R.string.paused_state))
+        .setContentText(
+          buildSubtitle(
+            context.getString(R.string.paused_state),
+            download.downloaded,
+            download.total
+          )
+        )
         // Set the ongoing true so that could not cancel the pause notification.
         // However, on Android 14 and above user can cancel the notification by swipe right so we
         // can't control that see https://developer.android.com/about/versions/14/behavior-changes-all#non-dismissable-notifications